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Vishay General Semiconductor - Diodes Division TPSMB33AHM3_A/I
- Part No.:
- TPSMB33AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
TPSMB33AHM3_A/I.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,873
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Product details
Overview
TPSMB33AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for clamping inductive switching surges and lightning-induced transients on power rails and signal lines. It features a 33 V breakdown voltage (VBR = 31.4–34.7 V at IT = 1 mA), 28.2 V stand-off voltage (VWM), 45.7 V maximum clamping voltage (VC) at 13.1 A peak pulse current, 600 W peak pulse power (10/1000 µs), and operates up to +185 °C junction temperature - ideal for automotive power rail protection.
For engineers reviewing the TPSMB33AHM3_A/I datasheet, TPSMB33AHM3_A/I pinout, TPSMB33AHM3_A/I application, or TPSMB33AHM3_A/I equivalent, key selection criteria include its AEC-Q101 qualification, halogen-free RoHS-compliant HM3 suffix, SMB (DO-214AA) package with cathode band polarity marking, and verified clamping performance under repetitive surge conditions per IEC 61000-4-5.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for high-temperature stability and low incremental surge resistance. Its unidirectional architecture enables robust forward conduction during overvoltage events while maintaining tight VBR tolerance (±5%) and low leakage (<1 µA at VWM).
The device is rated for 75 A non-repetitive forward surge current (8.3 ms half-sine), meets MSL Level 1 per J-STD-020 (260 °C reflow peak), and delivers stable clamping across -65 °C to +185 °C operating range - supporting under-hood automotive and industrial control applications where thermal derating and long-term reliability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 31.4 / 33.0 / 34.7 V at 1 mA - defines precise voltage threshold for avalanche conduction onset |
| VWM | 28.2 V - maximum continuous reverse working voltage before leakage exceeds 1 µA |
| VC @ IPPM | 45.7 V at 13.1 A - clamped voltage seen by protected circuit during 10/1000 µs surge |
| PPPM | 600 W - peak pulse power handling capability under standardized transient waveform |
| TJ max. | +185 °C - enables operation in high-temperature environments without derating loss |
| Polarity | Unidirectional - provides reverse-biased clamping only; forward voltage drop ≤3.5 V at 50 A |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 0.220" x 0.130" footprint and matte tin leads |
Pinout & Package
TPSMB33AHM3_A/I is housed in an SMB (DO-214AA) plastic package with two terminals: cathode (marked by color band) and anode. The package complies with UL 94 V-0 flammability rating and supports soldering per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts avalanche current to ground during overvoltage |
| Anode | Reference node | Typically tied to system ground or lower-potential rail; completes clamping path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Halogen-free & RoHS-compliant | HM3 suffix confirms compliance with environmental regulations and JEDEC JESD201 Class 2 whisker resistance |
| 185 °C junction rating | Enables placement near heat sources (e.g., power converters, engine controllers) without thermal shutdown |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage stress on downstream ICs compared to higher-ratio TVS devices |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking preconditioning |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V CAN bus power supply against load dump and alternator transients in vehicle ECUs. IC Role / Device Role / Timing Role: Transient voltage suppressor placed between battery rail and DC/DC input to clamp spikes up to ±100 V. Use Value: Prevents damage to downstream PMICs and microcontrollers using 45.7 V clamping at 13.1 A, validated under ISO 7637-2 Pulse 5a. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation PLC modules. IC Role / Device Role / Timing Role: Unidirectional TVS on 0–10 V or 4–20 mA signal lines to absorb ESD and inductive kickback from solenoid drivers. Use Value: Limits induced voltage to <46 V during 1 kV/500 Ω contact discharge (IEC 61000-4-2), preserving ADC accuracy and isolation integrity. |
| Telecom Line Card Surge Suppression | Consumer Power Adapter Input Protection |
Use Scenario: Front-end protection of PoE-powered Ethernet switches against lightning-induced surges on data lines. IC Role / Device Role / Timing Role: Paired with common-mode chokes and gas discharge tubes to shunt differential-mode transients on RJ45 pairs. Use Value: Delivers 600 W pulse handling with fast response (<1 ns) and low capacitance (<100 pF), minimizing signal distortion on 100BASE-TX links. | Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters for smart home hubs and IoT gateways. IC Role / Device Role / Timing Role: Clamping transient overshoot from transformer leakage inductance during MOSFET turn-off. Use Value: Maintains output regulation integrity with 28.2 V stand-off and 45.7 V clamping, preventing latch-up in USB-PD controllers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A | Same VBR range (31.4–34.7 V), but lower PPPM = 400 W; SMA package (smaller footprint, lower thermal mass) | Limited to lower-energy transients; not AEC-Q101 qualified | Select when board space is constrained and automotive qualification is unnecessary |
| TPSMB33AHM3_A/H | Identical electrical specs and construction; differs only in packaging - 7" tape reel (750 pcs) vs. 13" reel (3200 pcs) | No functional difference; choice depends on production volume and SMT line feed requirements | Choose based on assembly logistics - same device, different delivery format |
Compared with SMAJ33A and TPSMB33AHM3_A/H, the TPSMB33AHM3_A/I offers superior surge energy handling (600 W vs. 400 W), automotive qualification, and larger thermal mass from SMB packaging - making it preferred for high-reliability 24 V systems where sustained surge duty cycles occur.
Availability
TPSMB33AHM3_A/I is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface protection, telecom line card surge suppression, and consumer power adapter input protection requiring stable component supply and full traceability.
Supply support for TPSMB33AHM3_A/I includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, TVS, MOSFETs, and optoelectronics with emphasis on high-reliability and automotive-grade solutions.
The TPSMB series belongs to Vishay's PAR® family of surface-mount TVS diodes, engineered specifically for high-temperature stability and repeatable clamping performance in harsh automotive and industrial environments.
FAQ
What is the maximum clamping voltage of the TPSMB33AHM3_A/I under a 10/1000 µs surge?
The TPSMB33AHM3_A/I has a maximum clamping voltage (VC) of 45.7 V when subjected to its rated peak pulse current of 13.1 A under a 10/1000 µs waveform. This value is measured per IEC 61000-4-5 test conditions and ensures downstream components see limited overvoltage stress. The TPSMB33AHM3_A/I maintains this clamping performance across its full operating temperature range.
Is the TPSMB33AHM3_A/I qualified for automotive applications?
Yes, the TPSMB33AHM3_A/I is AEC-Q101 qualified and carries the HM3 suffix, indicating halogen-free, RoHS-compliant construction and validation for automotive use. It meets rigorous stress tests including high-temperature reverse bias (HTRB), temperature cycling, and mechanical shock - confirming suitability for under-hood and body-control module applications.
What does the "HM3" suffix mean in TPSMB33AHM3_A/I?
The "HM3" suffix in TPSMB33AHM3_A/I denotes halogen-free, RoHS-compliant construction with JESD 201 Class 2 whisker resistance and AEC-Q101 qualification. It distinguishes this variant from HE3 (RoHS-compliant but not halogen-free) and confirms compliance with automotive and green manufacturing standards.
What is the standoff voltage (VWM) of the TPSMB33AHM3_A/I, and why does it matter?
The TPSMB33AHM3_A/I has a standoff voltage (VWM) of 28.2 V, meaning it remains non-conductive below this reverse voltage with leakage <1 µA. This parameter ensures no interference with normal 24 V system operation while allowing reliable triggering above 31.4 V breakdown - critical for avoiding false trips in nominal-voltage environments.
Can the TPSMB33AHM3_A/I be used in bidirectional configurations?
No, the TPSMB33AHM3_A/I is unidirectional only, as confirmed in the Vishay datasheet. It clamps reverse-voltage transients only; forward conduction occurs at ~3.5 V. For bidirectional protection, two TPSMB33AHM3_A/I devices must be connected in series opposing configuration, or a dedicated bidirectional TVS such as SMBJ33CA should be selected instead.
TPSMB33AHM3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 28.2V
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 45.7V
- Current - Peak Pulse (10/1000µs):
- 13.1A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
TPSMB33AHM3_A/I FAQ
1.How can I place an order for TPSMB33AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMB33AHM3_A/I on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TPSMB33AHM3_A/I reliable?
The price and inventory of TPSMB33AHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMB33AHM3_A/I is usually 5 days.
3.What payment methods are accepted for TPSMB33AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMB33AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMB33AHM3_A/I?
TPSMB33AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMB33AHM3_A/I order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TPSMB33AHM3_A/I?
For technical support, including TPSMB33AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMB33AHM3_A/I requirements.
6.How does Aetrix verify that TPSMB33AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All TPSMB33AHM3_A/I products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPSMB33AHM3_A/I meets industry standards.
7.What is the process for return or replacement of TPSMB33AHM3_A/I?
All TPSMB33AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with TPSMB33AHM3_A/I, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TPSMB33AHM3_A/I part is unused and in its original packaging.
Return procedure for TPSMB33AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMB33AHM3_A/I Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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